No, my race tune was done on VP 110. I'm not going to pay extra for a higher octane fuel if I don't need it. The dude at Racers Source was really pushing the C12. It has a motor octane of 108 and the VP 110 has a motor octane of 107. $4 more a gallon for 1 octane number? No thanks. Does the guy you buy from have a shop or does he sell it out of his house?
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